Catalytic oxydehydrogenation of propane and work function measurements in similar conditions have been performed on V2O,/TiO2 catalyst. The oxidation mechanism C3H, + C3H, + COX + H20 has been kineticaliy modelled which permits theoretical evolution of the selectivity as a function of the conversion, for various ratios of K = k , / k 2 . A good correlation is obtained between the experimental and theoretical curves, validating the kinetic modelling. The value obtained for K is 41, so the reactivity of propene is much higher than that of propane and justifies the observed yield limitation. Moreover, the rate-determining step of propane ODH reaction as well as of propene oxidation is attributed to the attack of the oxidized site by the hydrocarbon. The value of K, which depends on the type of catalyst may be used to evaluate the selectivity to propene and for classification of oxydehydrogenation catalysts. The work function measurements give the nature and charge of the various oxygen species &I2-, 0-, 02-) involved in the reaction, and 02is found to react with propane. k i kz
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.